JIS A4201 PDF

Find the most up-to-date version of JIS A at Engineering Japan’s largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies. JIS A Protection of structures against lightning (FOREIGN STANDARD). Available for Subscriptions. Content Provider Japanese Industrial Standards.

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Design case using lightning-strike risk assessment.

High-speed and dependable access networks using jks fibers are becoming common now, and progress on an information and communications technology ICT society has accelerated. These regulations are more effective and economical than previous ones. As a result, it x4201 easy to determine the protected and unprotected areas of the structure Fig.

Lightning protection requires a synthetic measure against the various break-in paths of lightning surges, which are shown in Fig. You need Adobe Reader 7. However, the standard has a serious drawback in that it does not take into consideration flashes to sidewalls. Moreover, the break-in path of lightning q4201 is being complicated by the diversification of networks and equipment connection configurations Fig.

These technical requirements have become JIS A Our design procedure was as follows. For example, when the rolling sphere method is selected, the sphere radius is specified as 20, 30, 45, or 60 m, according to the protection level.

When JIS A Our findings showed it to be superior to the other methods. Thus, to determine the protected area of a structure, we need a design that provides a more complex calculation and intricate operation than that provided by only the protection angle method of JIS A He joined NTT in and worked on the maintenance, design, and construction of power equipment.

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First, the required level of lightning protection was established, and the occurrence probability of side flashes was calculated for all lightning currents having a probability of a lightning-strike exceeding the lightning current based on each of the lightning protection levels the details are based on IEC We were able to reduce the renovation costs by about one third compared with a design based on JIS A We are conducting ijs and development of surge protective devices, which are indispensable for internal lightning protection systems, as well as research and development of the external lightning protection system introduced in this article.

In JIS A He received the B. Then, based on the results, the lightning-strike probability and the economic efficiency were weighed for designs with the following bases: However, JIS A Points of JIS A revision. He was a visiting professor at the University of Technology in Malaysia in and helped to establish the Malaysian standard for lightning protection for IT systems. Various laws and specifications such as those of JIS A aa4201 It is possible to achieve protection by selecting either one of these methods or a combination of two or all three.

Thus, both versions of JIS A are currently still in legal use, though in practice they cannot be combined. He is currently engaged in electrical system design and management.

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We would like to emphasize the importance of implementing comprehensive lightning protection that provides not only external but also internal lightning protection.

JIS A – Protection of structures against lightning (FOREIGN STANDARD)

Introduction High-speed and dependable access networks using optical fibers are becoming common now, and progress on an information and communications technology ICT society has accelerated. Our 3D Lightning Protection Diagnosis System applies calculation logic in accordance with JIS A both andand it can easily indicate the areas of a structure protected by an air-termination system.

X4201 technology for external lightning protection systems Lightning protection requires a synthetic measure against the various break-in paths of lightning surges, which are shown in Fig. For these levels, there are three different design methods for achieving protection protection angle method, mesh method, and rolling sphere method.

Design Technology for an External Lightning Protection System for a Telecommunications Building

Jus moved to NTT Facilities in and worked on a PHS base station construction promotion project and on a data-center construction task-force. He joined NTT Facilities in Diversification, advanced features, and complexity are being pursued to enable the IP network infrastructure to provide us with greater benefits.

Currently, he is mainly engaged in solutions engineering for data-center, IT, power source, and lightning protection solutions.